rem mvn clean package
 
java -cp .\target\classes\  hdfs.Hello
java -cp ./target/hdfs-1.0-SNAPSHOT.jar hdfs.Hello 

rem java -cp junit-4.12.jar;./target/hdfs-1.0-SNAPSHOT.jar   junit.textui.TestRunner hdfs.HDFSTest.hello

mvn test -Dtest=hdfs.HDFSTest#hello